Hole spotter



Oct. 22, 1940. 4 J SCHORLE 2,219,152

HOLE SPOTTER Filed March 21, 1938 2 SheetsSheet l 1 N '2: I I fi czl ziarf IN VENT OR A TTORNE? Oct. 22, 1940. A H; J, SCHQRLE 2219,52

HOLE S POTTER Filed March 21, 1938 2 sheets-Sheet 2 FEE 22 7,9207% INVENTOR ATTORNEY Patented Oct. 22, 1940 i UITED STATES PATENT OFFICE HOLE SPOTTER Herman J. Schorle, Astoria, Long Island, N. Y., as-

signor to Worthington Pump and Machinery Corporation, Harrison, N. J., a corporation of Delaware Application March 21, 1938, Serial No. 197,295

2 Claims. (01. 255-45) This invention relates .to rock drilling equipis provided with a longitudinally extending slot ment, and more particularly to a hole spotter 8 opening out through its forward end in which for holding and guiding drill steels during the fits the flattened end 9 of the carrying standstarting of a drill hole. ard Iii.

An object of the invention is to provide a The carrying standard I!) is pivotally con- .5 hole spotter which is a unitary structure and nected to the plunger 3 by means of the pivot pin may be attached to conventional types of rock H and it has its lower or inner end I2 rounded drilling machines such as those shown in Patents as clearly shown in Figures 1 and 2 of the draw- Numbers 914,737, 1,690,859, and 709,022, and ings for riding over the inner end i3 of the slot which can be quickly and easily moved into drill 8 during the movement of the carrying standard 10 10 steel holding and guiding position or moved out H] from its drill steel guiding position into its of drill steel holding and guiding position and non-active position. clear of the drill steel so as not to interfere with The carrying standard iii has its upper or forthe continued operation of the drilling machine Ward position l5 cylindrical in shape and this after the hole has been started. cylindrical portion I5 rotatably receives a stem 15 With these and other objects in view, as may I5 on the upper end of which are formed the appear from the accompanying specification, the drill steel guiding members I! and I8. invention consists of various features of con- The drill steel guiding members I1 and I8 are struction and combination of parts, which will similar in construction to the drill steel guiding be first described in connection with the accommembers I and 8 of my companion application 20 panying drawings, showing a hole spotter of the filed of even date herewith and the stem I6 has preferred form embodying the invention, and a flat side I!) which cooperates with a moving the features forming the invention will be spelocking handle 20. The moving locking handle cifically pointed out in the claims. 20 cooperates with the way 2! formed on the In the drawings: carrying standard ill and its construction as 25 Figure 1 is a view partly in sectionand partly well as the construction of the way 2| and their in side elevation showing the improved hole cooperation is the same as the construction and spotter in drill steel guiding position. operation of the corresponding parts in my com- Figure 2 is a view similar to Figure 1 showing panion application above mentioned. the improved hole spotter out of drill steel guid- The carrying standard Ill has a pair of cams 30 ing position. 22 formed at the lower end of its cylindrical por- Figure 3 is a fragmentary end view of the hole tion I5 and these cams ride over the cam surspotter. faces 23 formed on the forward end of the cylin- Figure 4 is a detail cross section taken on the der 2 during the pivotal movement of the carryline 4dl of Figure 1. ing standard II) on its pivot II for moving the 35 Figure 5 is an end View of a plunger embodied plunger 3 forwardly and outwardly in the cylinder in the hole spotter structure. 2 against the tension of the spring 6 so as to per- Ref r i m re particularly to the drawings, mit the carrying standard Ill to be moved from the improved hole spotter comprises an attachits vertical active position as shown in Figure ing bracket I which may be attached in any suit- 1 of the drawings into its horizontal inactive able manner to the frame A of a rock drilling position as shown in Figure 2. The narrow flat 40 mac However, in the drawings the bracket end 9 of the carrying standard I0 is of such width l is Shown as attached to the end of the feed that when the carrying standard is moved into Sc B o a rock drilling machine of approved its horizontal inactive position the end portion construction such as the one shown in Paten of the end 9 will extend into the slot 8 in the 45 1 plunger 3 and into the forward end of the cylin- The att bracket I has a Cylinder 2 der 2 providing stabilizing means for holding the form d thereon in which is Slidably mounted a standard In quiet during the drilling operation plunger plunger 3 has a stem 4 formed of the drilling machine with which the hole spot- 5 thereon and projecting through the rear end 5 ter i xhausted,

of the cylinder 2. A spring 6 is mounted about As previously pointed out, the construction and the stem i and engages between the end 5 of the operation of the drill steel guiding members I'I cylinder 2 and the collar 1 carried by the stem and I8 is the same as that of the corresponding 4 for urging the plunger 3 rearwardly in the drill steel guiding members in my companion apcylinder 2. The forward end of the plunger 3 plication and therefore when it is desired to 55 steady a drill steel as shown at C during the starting of a drill hole, the stem I6 is rotated to bring the members I! and [8 into the position shown in both solid and dotted lines in Figure 2 of the drawings, at which time they will clear the drill steel and the standard l may be moved on its pivot II to move it into the vertical position shown in dotted lines in Figure 2 of the drawings and insolid lines in Figure 1. During this pivotal movement the cams 22 ride over the cam surface 23 so as to move the plunger 3 in the cylinder 2' sufiiciently to permit the pivotal movement of the carrying standard ID. When the carrying standard Ill reaches its normal vertical or perpendicular position, the earns 22 will have moved off the cam surfaces 23 and the spring 6 will move the plunger 3 inwardly into the cylinder 2 and force the rear edge of the end 9 against the forward end of the cylinder 2 for securely holding the standard ID in its upright position. The stem is then rotated to move the members I! and 18 into drill steel guiding position as shown in Figure 1 of the drawings.

It will be understood that the invention is not to be limited to the specific construction or arrangement of parts shown but that they may be widely modified within the invention defined by the claims.

What is claimed is:

1. In a hole spotter for rock drilling machines, an attaching bracket, a cylinder formed on one end of said attaching bracket, a plunger in said cylinder for reciprocatory movement therein, a standard pivotally connected to said plunger, drill steel guiding members carried by said standard, said standard pivotally movable into position perpendicular of the axis of said plunger when in drill steel guiding position and movable into position parallel to the axis of the plunger when in drill steel non-guiding position, a spring acting on said plunger to hold the standard firmly against said bracket when in drill steel guiding position and to move the pivoted end of the standard into said cylinder when the standard is in,non-guiding position, a cam on said standard, and an arcuate surface on said bracket and engaged by said cam for moving the standard and plunger longitudinally of the axis of the cylinder during pivotal movement of the standard.

2. In a hole spotter for rock drilling machines, an attaching bracket, a cylinder formed on one end of said attaching bracket, a plunger in said cylinder for reciprocatory movement therein, a standard pivotally connected to said plunger, drill steel guiding members carried by said standard, said standard pivotally movable into position perpendicular of the axis of said plunger when in drill steel guiding position and movable into position parallel to the axis of the plunger when in drill steel non-guiding position, a spring acting on said plunger to hold the standard firmly against said bracket when in drill steel guiding position and to move the pivoted end of the standard into said cylinder when the standard is in non-guiding position, a cam on said standard, and an arcuate surface on said bracket and engaged by said cam for moving the standard and plunger longitudinally of the axis of the cylinder during pivotal movement of the standard, the arcuate surface on said bracket terminating in a cam receiving depression for receiving said cam when said standard is moved into drill steel nonguiding position.

HERMAN J. SCHORLE. 

